imag = new Array ()
imag[0] = "images/nav/patientlogin-off.gif"
imag[1] = "images/nav/patientlogin-on.gif"
imag[2] = "images/nav/aboutus-off.gif"
imag[3] = "images/nav/aboutus-on.gif"
imag[4] = "images/nav/aboutorthodontics-off.gif"
imag[5] = "images/nav/aboutorthodontics-on.gif"
imag[6] = "images/nav/aboutbraces-off.gif"
imag[7] = "images/nav/aboutbraces-on.gif"
imag[8] = "images/nav/thegameroom-off.gif"
imag[9] = "images/nav/thegameroom-on.gif"
imag[10] = "images/nav/contactus-off.gif"
imag[11] = "images/nav/contactus-on.gif"
imag[12] = "images/nav/home-off.gif"
imag[13] = "images/nav/home-on.gif"

function swtch(num, imgname){
                imgname.src = im[num].src
        }
                im = new Array()
                for (var i = 0; i < imag.length; i++){
                im[i] = new Image ()
                im[i].src = imag[i]
        }